Fairies' Cross: See Stuarolite.
Flint: A gray, white, black, red, or brown stone found in all countries around the world. Beneficial to the entire body. All tissue, internal or external, will be helped, but especially the cardiopulmonary and cleansing systems. Helps one feel more whole and healthy. Gives a strong boost to your mental state and is extremely helpful for persons who have been afflicted by degenerative diseases.
 
Fluorite: All rainbow colors. Usually translucent and come in shades of white, brown, blue, yellow, purple, red, or colorless. Important balancer, healer. Opens heart (especially green), Throat Brow, Crown Chakra for clarity, overview, seeing additional truths/realities. Spleen bones, teeth, lungs, detoxification, anxiety, insomnia. Benefits the teeth and bones. People with arthritis, rheumatism, or spinal injuries have reported some relief from their conditions when they employ Fluorite in their healing regimen. Helps to rekindle sexual appetite and heighten intuitive powers. It is suggested using Fluorite in conjunction with Calcite and Pyrite. Assists in fighting mental disorder and gaining spiritual awakening. Helps one become more aware of the higher levels of reality and can anchor and free one from overstimulation on the psychic plane.
Clear and Purple: Objectivity; clears the way for new things, uplifting, aura cleanse, 3rd eye, eyesight, sinuses; repels colds. Enhances other gems.
Green: Stills mind and heart, harmonizes and recharges all Chakra. Green Fluorite is a valuable helper in grounding excess energies.
Blue: Throat, nose, ears, soothing; Karmic impasses resolved, atonement relieved.
Yellow: Focus, cooperation, group alignment. Yttrium: Lavender, well-being, serenity,peace, connection with universe/God/eternal life force.
Clusters: lowers work/life stress (helpful on your desk)
Double Pyramid: Aligns spirit with physical plane, inner with outer awareness, and 2 sides/brain; Crown Chakra, illuminating karmic lessons.  

Fuchsite: Fuchsite is a CHROME-mica, Muscovite is a white mica. Lightheartedness, friendliness, compassion, recovery, immunity. Speeds deeper healing.